Greeneggs you mentioned upthread about not looking at websites in order to form ones opinion about what Muslims think. Absolutely agree with that, as the majority of muslims themselves are not aware of the history and the numerous dictats and specifics of the Quran and Hadiths.
A brief explanation for non-muslim posters: most muslims are not native Arabic speakers. They are taught to read Arabic and recite prayers in the language but almost none have any idea of what they are reading and saying when doing so in Arabic. Islam proscribes that the Quran be read in Arabic and prayers also conducted in the same.
Islam to most children, is taught predominantly in terms of practices and broad beliefs, such as that of monotheism (rather than polytheism), belief in the prophets of the Bible, some of the stories e.g. the Great flood, Moses, Adam & Eve etc etc. Jesus features heavily and is revered as a prophet (but who's message subsequently got distorted, hence the need for Muhammed).
Your average Muslim, in the West at least, grows up thinking Islam is a lot like Christianity and consequently co-opts Christian values such peace, love and forgiveness to others. There are verses in the early chapters of the Quran that preach such things and hence the insistence by Muslims that acts of barbarity and violence are against Islam and that terrorists are not 'real muslims'.
The information on those other websites that non-muslim posters are referring to is alien to virtually all muslims. Some of it is indeed nonsense, but unfortunately a lot of it is not.
My path to abandonment of Islam occurred due to me reading more about 'my faith'. This happened over 25 years ago, pre the Internet. My source material was Islamic literature from Islamic bookshops. Translations and tafsirs (explanations) by accredited muslim scholars assert that much of what is written in 'those websites' is indeed unfortunately correct. The fact that most muslims are ignorant of such teachings or disagree with the interpretation does not mean Islam is not guilty of the messages being used to promote violence and disorder, or hate towards non-muslims or unequal treatment of women and minorities.
It is simply no longer enough to say that 'those verses are taken out of context', 'the extremists have distorted true Islam' etc etc. Such assertion are now hollow. Start critically examining it, like I did without any bias (actually I started with a bias towards it, having being born into the faith). Islam has ruined so many lives already. When it was confined to the East, Westerners didn't much have any reason to care or know about it. Now its on our doorstep, many people are examining it and coming to the conclusion that there is something very wrong with it. Muslims cannot continue to bury their heads in the sand.